CN102997616A - Method for preparing oxygen and argon rapidly - Google Patents

Abstract

The invention relates to a method for preparing oxygen and argon rapidly. The method comprises that when the main cooling liquid is in a range of 10% to 15% of the total, liquid oxygen and liquid nitrogen pumps are started to enable all gas in an air compressor to participate in rectification; a crude argon pump is started, and a discharge valve of the crude argon pump is opened, wherein the valve opening range is between 5% and 7%, so that low-temperature liquids at the bottom of the crude argon pump flow back to a main tower; when the oxygen purity in the main tower achieves more than 99%, the oxygen is fed in a crude argon tower; and crude liquid argon is fed into a pure argon tower when the oxygen bearing amount is smaller than or equal to 3ppm. Compared with the prior art, the method has the advantages of being simple and practical and easy to master, shortening the production time for products with qualified gas purity greatly, and providing power guarantees for subsequent steel production.

Description

The method of a kind of quick oxygen producing, argon gas

Technical field

The present invention relates to the energy source and power field, particularly the method for a kind of quick oxygen producing, argon gas.

Background technology

In the process of industrial producing oxygen and argon gas, until the qualified time of product oxygen purity is generally 4～6 hours, the time that purity of argon is qualified was generally 16 hours when interior compression process oxygenerator was restarted after parking.Traditional oxygen producing and the technological process of argon gas are to start air compressor machine, throwing chilldown system, startup supercharger, startup decompressor, technique liquid oxygen pump and liquid nitrogen pump, restart the crude argon pump and throw crude argon column, pure argon column after the product oxygen purity is qualified.But there is some drawback in this starting method: 1) because the liquid level of main condenser evaporimeter increasess slowly, technique liquid oxygen, liquid nitrogen pump slowly do not possess entry condition, cause air compressor machine gas all not participate in rectifying, have delayed the qualified time of oxygen purity; When 2) oxygen purity was thrown crude argon column after qualified again, the backflow impact of gas of liquid and condenser/evaporator can cause king-tower rectifying operating mode to destroy owing to backflow in the crude argon column bottom, causes oxygen purity again to destroy; 3) because the operating mode of king-tower is destroyed, need follow procedure to restart again, cause repeatedly repeatedly to start.Above-mentioned start-up routine finally causes the qualified time lengthening of product gas purity, and is difficult to hold in operation, and is very high to operator's operative skill requirement, wasted the energy and fund.

Therefore, producing of industrial oxygen and argon gas needs can save time in a kind of product quality guaranteeing oxygen and argon gas, and then the method for energy saving.

Summary of the invention

The method that the purpose of this invention is to provide a kind of quick oxygen producing, argon gas, the qualified production time of product gas purity has been shortened in simple and practical, the easy grasp of the method greatly, for the production of follow-up iron and steel provides the power assurance.

For achieving the above object, the present invention realizes by the following technical solutions:

The method of a kind of quick oxygen producing, argon gas may further comprise the steps:

1) when the scope of main cold liquid level is overall 10%～15%, starts liquid oxygen, liquid nitrogen pump, make the gas of air compressor machine all participate in rectifying;

2) start the crude argon pump, with the valve opening of sending of crude argon pump, the valve opening scope is 5%～7%, makes the cryogenic liquid of crude argon column bottom flow back to king-tower;

3) reach 99% when above when the oxygen purity of king-tower, drop into crude argon column;

4) when thick liquid argon contains oxygen≤3ppm, drop into pure argon column.

Compared with prior art, the invention has the beneficial effects as follows: 1) simple and practical, the easy grasp of the method; After the method came into operation, the time of producing qualified oxygen was 1.5～2 hours, and the time of producing qualified argon gas is 10～12 hours, has greatly shortened the production time, has improved production life cycle; 3) the method has improved the production efficiency of oxygen and argon gas, has saved the production time, and then energy saving, has saved fund, for the production of follow-up iron and steel provides the power assurance.

The specific embodiment

Embodiment one, and the method for a kind of quick oxygen producing, argon gas may further comprise the steps:

1) when main cold liquid level is 10%, starts liquid oxygen, liquid nitrogen pump, make the gas of air compressor machine all participate in rectifying;

2) start the crude argon pump, with the valve opening of sending of crude argon pump, the valve opening scope is 7%, makes the cryogenic liquid of crude argon column bottom flow back to king-tower;

3) when the oxygen purity of king-tower reaches 99%, drop into crude argon column;

4) when thick liquid argon contains oxygen and is 3ppm, drop into pure argon column.

Embodiment two, and the method for a kind of quick oxygen producing, argon gas may further comprise the steps:

1) when main cold liquid liquid level is 13%, starts liquid oxygen pump, make the gas of air compressor machine all participate in rectifying;

2) start the crude argon pump, with the valve opening of sending of crude argon pump, the valve opening scope is 6%, makes the cryogenic liquid of crude argon column bottom flow back to king-tower;

3) when the oxygen purity of king-tower reaches 99.2%, drop into crude argon column;

4) when thick liquid argon contains oxygen and is 2.5ppm, drop into pure argon column.

Above embodiment is two most preferred embodiments selecting in numerous specific embodiments, but is not the restriction to protection domain, and the data area that limits in claims all can obtain good effect.

Claims (1)

1. the method for a quick oxygen producing, argon gas is characterized in that, may further comprise the steps:

1) when the scope of main cold liquid level is overall 10%～15%, starts liquid oxygen, liquid nitrogen pump, make the gas of air compressor machine all participate in rectifying;

2) start the crude argon pump, with the valve opening of sending of crude argon pump, the valve opening scope is 5%～7%, makes the cryogenic liquid of crude argon column bottom flow back to king-tower;

3) reach 99% when above when the oxygen purity of king-tower, drop into crude argon column;

4) when thick liquid argon contains oxygen≤3ppm, drop into pure argon column.